American Idioms Part III

A penny saved is a penny earned - a proverb meaning that money saved through thrift is the same as money earned by employment. (Sometimes used to explain stinginess).

apple os someone´s eye - someone´s favorite person or thing: a boyfriend or girlfriend; a person or a thing that someone wants.

(as) clear as mud! - not understandable

(as) comfortable as an old shoe - very comfortable and familiar